Contrivance for feeding locomotive and other boilers with hot water.



C. CAILLE. CONTRIVANCE FOR FEEVDING LOCOMOTIVE A`ND OTHER` BOILERS WITH HOT WATER.

APPLICATION FILED JAN.I,19H.

C. CAILLE.

CONTRIVANCE FOR FEEDING LOCOMOTIVE AND OTHER BOILERSWITH HOT WATER.

APPLICATION FILED IAN'. Io, I9II.

l I 179,071 Patented Apr. 11, 1916.

l l-l 2 SHEETS-SHEET 2.

s Hy. 5. Q. y

afn/M l THE COLUMBIA PLANOGRAPH co.. WASHINGTONA n. c.

UNTTED sTaTas PATENT carica.

CHARLES CAILLE, OF PERREUX, FRANCE, ASSIG'NOR TO L. HUFFR' 8c CIE., OF

Y PARIS, FRANCE. I

CONTRIVANCE FOR FEEDING- lLOCOllVIOTIVE AND OTHER BOILER-S WITH -I-IOT WATER. i

erators, in whichvinstallations use is made vof the steamA exhausted from the engine or of the ,hot gases escaping up the chimney, it is advantageous for the heating Vcon- 'trivanceto be subjected to apressure as low motives.

as possible, for the construction is Vvthus facilitated as is also cleaning, the adherence of deposits (scale and the like) being lessened. .Also the vapor is more easily con- Vdensed. Onthe other hand the .feeding de vice (the pumplshould be adapted to perform its functions whatever may be the temperature of the water previously heated,

"and, to facilitate working, itis preferable for the pumpto be placed on `aleve'l lower than Vthat of the receiver from which is drawn the water which isfed .to the .steam generator. The cold water reservo-ire and the feed pump?I are therefore arranged as shown diagrammatically in Fig. l.V Fur- Vther,'this pumpshould be placed in as; low aposition ias possible, and the heater arranged on a level with the source Vof cold water 4 (the tender for example). But it is often veryl difficult to fulfilthese'conditions,` particularly in dealing with loco- The new contrlvance permits a steam generator to be fed with water prevlously heated, whatever may be the relative levels of the three elements, the cold4 waterreser-V voir 4, the heater p and the pump 2.

' The contrivance consists in principle, as

shown diagrammatically in Fig; 2, in combining the feed pump .2,"interpose'd between .the heater and the generator, with a second pump l interposed between the Vheater 79 ,andl the cold water "reservoir 4, the two pumps. working 1n synchronism and 1nA opposite directions, that is to say, the evacuation stroke .of one coinciding with 4the inlet Astrokefof the other, andvice-versa.' j'The Specification of Letters Patent.

Patented Apr. 11, 1916.

i Application mea January 1o, 1911. serial No.V 601,770.

result of thisarrangement isthat the Vtwo conjugate pumps l, 2 between which is the heater, and which work, the one numberedv l with cold water, the other 2 with hot water, can be placed on any level relatively to the heater' and to the reservoir 4, the heater itselfv occupying any position relatively to the reservoir.

Y In practice the conjunction of the two pumps with the heater interposed between them can be carried' out in fa variety of ways. By preferencethe arrangement employed is the one shown as a representative example in the annexed drawing and comprising a pump with a single piston operating with two pump chambers, each provided with a completeset of valves (suction and delivery valves), one of the pumpv elements being fed with Vcold water from fthe` tank or tender and the "other with hot water.

' `Figure lis a diagrammatic view of avcoln-r bined heater and feeder. Fig. 2 is a diagrammatic viewv of a combinedxheater and feeder embodying the present invention. Fig. 3 is an elevation partly in section of this special pump and its connections 'with the cold water reservoir, the heater and the v generator' to be fed; Fig. LLis alongitudinal section, theVv section of the pump being taken along A-A ofFig. 3, and ofthe valves along B-B of the same figure. i

` Inv the example shown, the" apparatus atA comprises as., pump a, divided by a` single V'piston binto two compartments 1', 2 which communicate respectively with the valves (ad. The chamber e of the valve box ccan communicate through the Vmedium of the valves f, g respectively with the inlet'passage It' and the Vdelivery passage 71. The chamber j of the valve box 0l can be put into communication, through the medium of the valves 7c and `m respectively with the inlet passage/m andthe delivery passage o.

In Fig. 3, p represents a heater of any known form in which the heating fluidenters throughthe pipe g' and escapes through thel pipe 1,"8 represents the exit for the heated liquid; t is a motor ofv anyknown `form for driving the pump. ,Thecompartments'l and 2.constitute two pump chambers ;f the onernumbered 1` in the example shown,fis fed with Coldwater from afreservoir (not shown) means of a pipe 'u' which f leads into theinlet passage 71 the delivery passage "b'eingfconnected bya pipe v to a L allowed, from 7 to S meters.

branch w of the heater p. The other pump element 2 is in this case fed with hot water from the heater p by a pipe x leading to the passage a, the delivery passage o being connected by a pipe g/ to the steam generator. It is obvious that the feeding of the chamber l with cold water will take place under all circumstances and without the least difficulty whatever may be the position of the chamber' a. in relation to the cold water reservoir. That is evident for a locomotive as the differences in level are very limited; of course with a stationary installation the difference in level should not exceed the limit The delivery into the heater is accomplished in a similar manner and without the least difculty in every case. It should be observed that the heater forms in reality a passage in which the water forced from the pump chamber l K to the chamber 2 circulates and that conse quently the level which this passage occupies in relation to the passage n matters but little. 'In the drawing the heater p is shown above the passage, but it might just as well be disposed beneath.

The action of the apparatus is as follows rlhe piston?) is assumed to be in the position shown in the drawing and to be moving upwardly. t draws inV at 71. cold water coming from the reservoir by the pipe u, and which, raising the valve 7L', enters the chamber e, and flows through the passage a into the chamber l. At the same time the piston by its upper surface drives out the heated water which filled the chamber 2, which water by means of the passage 3, the valve m, the passage 0 and the pipe y iinds its way to the generator. In its down stroke, the pis- Vton draws heated water from y) through x-nf-a-j-S while from below it drives out the water which filled the chamber l,

A and which is delivered to the heater through .a-e-pf/--i1 w. By reason of the volume of the rod of the piston Z2 the chamber 2 has, in the example shown, a smaller capacity than the chamber l, so that from the difference inV delivery of the two pumps there might result an excess of pressure in the heater. In order to provide for this, the pipe fu must be provided with an overlow branch pipe of a section that can be regulated, the overflow water being conducted to the inlet of the cold water pump.

In practice, particularly in the application of the invention to locomotives, it is advantageous to diminish the length of the various systems of pipes as much as possible; in order to avoid superpressure in the heater or to maintain a pressureA less than one` atmos- K phere for example on the walls', the pipe o is directly Vconnected to the pipe u.' But then it is necessary to prevent any premature admission which would tend to take placev directly 'from e to u owing to the vacuum existing in the latter pipe at the moment of admission.l It is the achievement of this result whiclrthe contrivance illustrated in Fig. 5 illustrates. As shown in this figure the pipe o, which conducts cold water to the heater is connected to the pipe u by means of a valve-box 6 and a pipe l1. rIhe valve-box 6 contains a valve, represented in the drawing as a piston valve 7 Th1s valve rests formed with openings 8. on a valve 9 of smaller diameter, held on its seat by a spring 10 of strength such that the valve 9 cannot move from its seat even if there exists in the pipe u a complete vacuum, and so long as the pressure in the heater does not exceed the maximum limit selected. When this limit pressure is reached, the piston valve '7, owing to its greater diameter', is able to displace the valve 9 and uncover the openings 8. A certain quantity of water then passes from fu to u until the pressure in the heater falls to the maximum value selected. p

The piston b is preferably constructed as shown in Fig. 1L. The minimum height of this piston should be at least as great as the length of the stroke, in order to prevent a portion of the chamber ai being alternately in contact with the hot and the cold water. In addition, the piston is made in two parts separated by a ring 5V of insulating material, in order yto prevent :my transmission of heat from the upper to 'the lower part, the two parts working respectively in a warm water and a cold water chamber. The same construction of two parts insulated from one another can evidently be applied to the pump cylinder a.

I claim:

1. In a boiler feeding apparatus, a heater, a double-acting suction pump comprising a cylinder and a piston operating in said cvlinder, a supply pipe leading to one end of the pump cylinder, a second pipe leading from the same end of the pump cylinder to the heater, a third pipe leading from the heater to the opposite end of the cylinder, a boiler pipe leading from the last-named end of the cylinder, a non-return check valve provided ed in each pipe connection, and a compensating valve including` a casing connecting the supply pipe with the second pipe, a valve member adapted to seat within the casing, resilient means for maintaining the said valve member seated against the action of decreased pressure -within the supply pipe, and a second valve member adapted to seat within the casing on the side of the first valve member adjacent to the second pipe and being associated with the iirst l member so as to open the same upon being opened by increased*v pressure within the said second pipe. f

2. In a boiler feeding apparatus, a heater, a double-acting suction pump comprising a cylinder and a piston operating in said cylinder, a supply pipe leading to one end of the pump cylinder, a second pipe leading from the same end of the pump cylinder to the heater, a third pipe leading from the heater to the opposite end of the cylinder, a boiler pipe leading from the last-named end of the cylinder, a non-return check Valve provided Vin each pipe connection, and a compensating member seated against the action of decreased pressure Within the supply pipe, and

a second Valve member adapted t0 seat Within the casing on the side of the first and being associated With the first memberA so as to open the same upon being opened second pipe, the second Valve member being constructed to present a greater area of effective surface to the Water Within the second pipe than the first valve member presents to the Water Within the supplyY pipe.

In testimony whereof I have signed my name to this specication in the presence of two subscribing Witnesses.

, CHARLES` CAILLE. Witnesses Louis FANTRAL, H. C. CoXE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C."

lby increased pressure Within the said 

